Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 360
FlG. 419. — Automatic Arc Lamps. 338 APPENDIX changeable gears so that it can be used either on direct or alternatingcurrent. For instance, as the gears are set on cut, the lamp is arrangedfor direct current. If, however, it is desirable to use alternating current, … Fig. 420. — Combination Beseler Double Lantern and Moving Picture Apparatus. one thumbscrew is released, another thumbscrew is unscrewed, and itsscrew is removed. It is then possible to move the upper carbon holderforward so that its gear meshes with the inner gear on the lower carbonholder. This…
Electricity · Electrical engineering
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